• P- Pobeha, I Paranicova, I Trojova, R Tkacova, and P Joppa.
• Bratisl Med J. 2021 Jan 1; 122 (4): 248-250.

ObjectiveTo evaluate the acute effects of volume-targeted non-invasive ventilation (NIV) on hemodynamic parameters assessed by impedance cardiography in patients with obesity hypoventilation syndrome (OHS).BackgroundDespite the well-described beneficial effects of NIV using volume-targeted pressure support ventilation modes on respiration in OHS patients, questions were raised about the impact of this treatment on the cardiovascular system.MethodsIn 15 patients (10 men; mean age, 55.8±9.3 years) impedance cardiography recordings were taken at baseline, after 120 minutes while on NIV and 20 minutes after NIV termination. A repeated-measures analysis of variance was used for comparisons.ResultsCompared to baseline, a reduction in heart rate (from 80±11 to 73±10 beats per min, p<0.05) was observed on NIV whereas the stroke volume and cardiac index remained stable throughout all three assessed intervals (p=0.347, p=0.344; respectively). The pre-ejection period increased on NIV (from 113±16 to 127±20 ms, p<0.05), and the left ventricular ejection time increased after NIV termination compared to baseline (from 259±25 to 269±25 ms, p<0.05).ConclusionVolume-targeted NIV may acutely improve systolic time intervals without any negative impact on the left ventricular function in OHS patients (Tab. 2, Ref. 17).

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